CN102311208A - Method and device for supplying underground water with municipal sewage through biofilter and ultrafiltration technology - Google Patents
Method and device for supplying underground water with municipal sewage through biofilter and ultrafiltration technology Download PDFInfo
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- CN102311208A CN102311208A CN201110223188A CN201110223188A CN102311208A CN 102311208 A CN102311208 A CN 102311208A CN 201110223188 A CN201110223188 A CN 201110223188A CN 201110223188 A CN201110223188 A CN 201110223188A CN 102311208 A CN102311208 A CN 102311208A
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Abstract
The invention relates to a method and a device for supplying underground water with municipal sewage through a biofilter and an ultrafiltration technology. The method adopts second-grade treated water as a raw material from a municipal sewage treatment plant and comprises the following processes that the second-grade treated water passes through a denitrification biofilter and an ultrafiltration device, undergoes an ozone reaction, seeps into the ground in a way of flooding on the surface of the ground, passes through a soil vadose zone and enters a phreatic aquifer. The method and device belonging a municipal sewage advanced treatment technology can remove effectively and economically multiple pollutants in municipal sewage, make product water satisfy three types of underground water quality standards and realize safe supplying of underground water.
Description
Technical field
The present invention relates to WWT reutilization technology field, relate in particular to a kind of method of municipal effluent recharge groundwater.
Background technology
China is a country that drought and water shortage is serious; City sewage deep treatment and reuse; Also as an important channel that solves urban water shortage, raising water utilization rate and control water pollution; Have other strategy process incomparable advantage,, become the effective measure of alleviating the shortage of water resources present situation for alternative existing water source, the water source of " newly " provides possibility.
Present city domestic sewage; After sewage work's second-stage treatment; Even water outlet reaches the emission request of urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level B standard: COD, total nitrogen, colourity and excrement colibacillus group be still respectively up to 60mg/L, 20mg/L, 30 and 104/L, but hindered the degree capable of using of municipal effluent greatly.Though further secondary treated wastewater is carried out effective advanced treatment, remove each pollutant in the water, realize the extensive safe reuse of reuse water, be the problem that needs emphasis to solve in the city sewage deep treatment process.
The water reuse process technology is along with the continuous increase of reclaimed water reuse amount and the continuous expansion of reuse approach grow up, and different reuse waters uses approach, and different water quality requirements is just arranged.Along with the continuous aggravation of the nervous trend of city water resource, the demand of reuse water is continued to increase, the reuse water range of application progressively enlarges, and purposes is progressively expanded, and water-quality guideline also develops into the strict demand of many index from original single index.
At present; Nitrogen and organism are the pollutents that need pay close attention in the groundwater recharge process; And total nitrogen has surpassed total nitrogen concentration value in three types of quality of groundwater standards generally at 20～30mg/L in the secondary effluent of existing sewage work, can not be directly as the source water of recharge groundwater; Organism is also of a great variety in the secondary effluent, like medicine and skin care item (PPCP) and metabolite, endocrine disrupter (EDC) with have aromatic amine material of genotoxicity etc.
Summary of the invention
The present invention is directed to the deficiency of above-mentioned prior art; Provide a kind of biological filter to add the method and apparatus of ultrafiltration technology with the municipal effluent recharge groundwater; Remove multiple pollutent in the municipal effluent effectively, make water outlet satisfy three types of quality of groundwater standard-requireds, realize phreatic safe supply.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of biological filter adds the method for ultrafiltration technology with the municipal effluent recharge groundwater; Comprise following process: the secondary treated wastewater with the municipal sewage plant is a raw material; Through behind denitrification bio-filter, ultra-filtration equipment and the ozone reaction, permeate the ground with the surface flooding irrigation form, get into water table aquifer through the soil aeration zone.
Preferably, secondary treated wastewater is the bottom entering from denitrification bio-filter, and the C/N ratio is 4～6 in this denitrification bio-filter, and the pH value is 6.5～8.5.
Preferably, the ultra-filtration membrane material is molecular weight cut-off 100000～150000 daltonian tubular fibres in the said ultra-filtration equipment.
Preferably, the pressure reduction of said tubular fibre is that 0.04～0.1MPa, temperature are 13.1～25.4 ℃.
Preferably, the ozone dosage is 2～10mg/L water, and water residence time in ozone reactor is 10～30min.
Preferably, said aeration zone thickness 3m at least.
Preferably, the hydropexis of said water table aquifer is 3～December.
Compared with prior art, the method that the present invention adopts denitrification bio-filter, ultrafiltration, ozone to combine with the soil treating unit is a source water with the Sewage Plant secondary effluent, makes municipal effluent reach the regenerated using requirement after the advanced treatment.Municipal effluent utilizes the mikrobe denitrification of denitrification bio-filter technology after second-stage treatment, remove nitrate salt and phosphorus etc. in the secondary effluent; The denitrification bio-filter water outlet gets into the uf processing unit, removes turbidity, bacterium, organism etc. in the water; The ultrafiltration water outlet is further removed larger molecular organics in the water through ozone oxidation, improves the biodegradability of water outlet, and sterilization and disinfection is carried out in water outlet; The ozone water outlet gets into aeration zone soil treating unit, further removes ammonia nitrogen in the water, TP and organism.This Xiangcheng City's sewerage advanced treatment process can be removed multiple pollutent in the municipal effluent very cost-effectively, makes water outlet satisfy three types of quality of groundwater standard-requireds, realizes phreatic safe supply.
The denitrification of denitrification bio-filter technology utilization mikrobe is carried out denitrification with nitrate salt in the secondary effluent, is converted into nitrogen and discharges from water body, simultaneously because the effect of mikrobe denitrification dephosphorization can be removed a part of phosphorus in the water.Denitrification bio-filter and ultrafiltration and ozone process coupling; Can further remove turbidity in the water, bacterium, organism etc.; Improve the biodegradability of water outlet, and produce extremely strong antozone and the hydroxyl of oxidation capacity, organism, bacterium and mikrobe in the water of decomposition; Realization is a both economical effective city sewage deep treatment process system to the sterilization and disinfection of treat effluent.Reuse water recharges the pond to the underground reservoir infiltration process from the face of land, is further purified by means of physics, chemistry and the biological action of soil; Simultaneously, underground reservoir can provide support for increase groundwater resource, the seasonal water contradiction in adjusting city, for sustainable utilization of water resource provides a kind of new water source as the natural storage space of reuse water.
A kind of biological filter adds the device of ultrafiltration technology with the municipal effluent recharge groundwater, comprises denitrification bio-filter, ultra-filtration equipment, the ozone reactor of pipe connection successively and recharges the pond.
The present invention has the following advantages and the high-lighting effect: 1. the present invention adopts denitrification bio-filter, ultrafiltration, ozone and the effect of soil treating unit associations; The municipal wastewater treatment plant secondary effluent is carried out advanced treatment; Water outlet can be satisfied three types of quality of groundwater standard-requireds, realizes phreatic safe supply.2. denitrification bio-filter, ultrafiltration are combined with ozone, can give full play to advantage each other.Denitrification bio-filter can effectively reduce nitrate salt and phosphorus in the secondary effluent; Ultrafiltration residual turbidity, bacterium and organism etc. in removing water have more advantage; Ozone then can destroy the molecular structure of pollutent such as microbiotic, estrogenic chemicals, the microbial metabolites of part emphasis control etc.; Remove pathogenic micro-organism, improve the biodegradability of water outlet.3. pollutents such as disease caused by infectious water substance, organism, nitrogen phosphorus both can further be removed in the soil treating unit, increased groundwater resources amount, can remove the misgivings of the public to reclaimed water reuse again.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Description of reference numerals:
The 1-denitrification bio-filter;
2-recharges the pond;
The 3-ultra-fine filter;
The 4-ozonizer;
5-ozone reaction jar;
Aeration zone in the 6-soil;
Water table aquifer in the 7-soil.
Embodiment
A kind of method of municipal effluent recharge groundwater comprises following process:
1) with city domestic sewage after sewage reason factory second-stage treatment, reach urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level B emission request: COD, total nitrogen, colourity reach 60mg/L, 20mg/L, 30 respectively.
2) denitrification bio-filter technology is set after secondary treatment yielding water, utilizes the denitrification of mikrobe, remove nitrate salt and phosphorus etc. in the water.Denitrification bio-filter is intake with upflowing, and carbon source adds in the process C/N than 4～6, pH6.5～8.5, and filter back washing intensity is 6L/ (m2s), and filtering velocity is 8.9m/h, and backwashing period is about 1d.
3) after the denitrification bio-filter technology, uf processing technology is set.The ultra-filtration membrane material is the tubular fibre structure, molecular weight cut-off 100000～150000 dalton, and mould differs from 0.04～0.1MPa, adopts the cross-stream design, 13.1～25.4 ℃ of temperature.
4) the ultrafiltration water outlet gets into the ozone reaction jar through header tank and water pump.Ozonizer is the oxygen source with the air; To disperse small bubbles to get into ozone in water dosage 2～10mg/L, hydraulic detention time 10～30min from the retort bottom; Ozone is fully contacted with water; Be used to destroy the molecular structure of pollutent such as microbiotic, estrogenic chemicals, the microbial metabolites etc. of the control of part emphasis, remove pathogenic micro-organism, improve the biodegradability of water outlet.
5) face of land is recharged and is done/the wet alternate operation, and wet spell recharges an interior reuse water and is higher than pedosphere 20cm at least; Soil surface is fully contacted, experience drainage and reoxygenation with air; Be 1～4 times of wet spell working time dry spell; Recharge bottom, pond soil aeration zone thickness 3m at least; To guarantee the abundant decomposition of materials such as C, N, the reuse water that gets into underground reservoir must be realized phreatic safe supply and final water intaking safety in 3～December of subsurface detention.
Below in conjunction with accompanying drawing 1 and following embodiment the present invention is further described.
Embodiment 1:
City domestic sewage is after sewage work's second-stage treatment, and from denitrification bio-filter 1 bottom A water inlet, wherein carbon source adds in the process C/N than 4 in the denitrification bio-filter 1, pH8.5.Utilize the denitrification of mikrobe, 85% nitrate salt, 52% TP in the removal water.
The upper water-out of denitrification bio-filter 1 gets into ultra-filtration equipment 3, and this ultra-filtration equipment 3 adopts molecular weight cut-off 150000 daltonian tubular fibres, mould difference 0.04MPa; 9%TOC, 85% turbidity and 97% total coli group are removed in the design of employing cross-stream.
The ultrafiltration water outlet gets into ozone reaction jar 5 through header tank and water pump.Ozonizer 4 is the oxygen source with the air, gets into ozone in water dosage 2mg/L to disperse small bubbles from the retort bottom; Hydraulic detention time 30min; Ozone is fully contacted with water, be used to destroy the molecular structure of pollutent such as microbiotic, estrogenic chemicals, the microbial metabolites etc. of the control of part emphasis, remove pathogenic micro-organism; Kill in the water 40% total plate count and 90% intestinal bacteria, improve the biodegradability of water outlet 10%.
The water entering face of land after ozone reactor is handled is recharged field 2 and is done/the wet alternate operation; Be 1～4 times of wet spell the working time of dry spell, and water infiltrates soil aeration zone 6 and water table aquifer 7 through recharging 2 bottoms, pond, and aeration zone 6 thickness are 4m; To guarantee the abundant decomposition of materials such as C, N; 23%DOC, 25%UV254,74%NH4-N are removed in the water outlet, can satisfy three types of quality of groundwater standard-requireds, realize phreatic safe supply.
Embodiment 2:
City domestic sewage is after sewage work's second-stage treatment, and from denitrification bio-filter 1 bottom A water inlet, wherein carbon source adds that C/N is than 6 in the process, and pH 6.5.Utilize the denitrification of mikrobe, 80% nitrate salt, 50%TP in the removal water.
The water entering face of land after ozone reactor is handled is recharged field 2 and is done/the wet alternate operation; Be 1～4 times of wet spell the working time of dry spell, and water infiltrates soil aeration zone 6 and water table aquifer 7 through recharging 2 bottoms, pond, and aeration zone 6 thickness are 3.5m; To guarantee the abundant decomposition of materials such as C, N; 23%DOC, 25%UV254,74%NH4-N are removed in the water outlet, can satisfy three types of quality of groundwater standard-requireds, realize phreatic safe supply.
Embodiment 3:
City domestic sewage is sentenced upflowing water inlet from denitrification bio-filter 1 bottom A after sewage work's second-stage treatment, carbon source adds that C/N is than 5 in the process, and pH is 7.Utilize the denitrification of mikrobe, 82% nitrate salt, 55%TP in the removal water.
The water outlet of ultra-fine filter 3 gets into ozone reaction jar 5 through header tank and water pump.Ozonizer 4 is the oxygen source with the air, gets into ozone in water dosage 10mg/L to disperse small bubbles from the retort bottom; Hydraulic detention time 20min; Ozone is fully contacted with water, be used to destroy the molecular structure of pollutent such as microbiotic, estrogenic chemicals, the microbial metabolites etc. of the control of part emphasis, remove pathogenic micro-organism; Kill in the water 100% total plate count and 100% intestinal bacteria, improve the biodegradability of water outlet 10%.
The water entering face of land after ozone reactor 5 is handled is recharged field 2 and is done/the wet alternate operation; Be 1～4 times of wet spell the working time of dry spell, and water infiltrates soil aeration zone 6 and water table aquifer 7 through recharging 2 bottoms, pond, and aeration zone 6 thickness are 5m; To guarantee the abundant decomposition of materials such as C, N; 23%DOC, 25%UV254,74%NH4-N are removed in the water outlet, can satisfy three types of quality of groundwater standard-requireds, realize phreatic safe supply.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (8)
1. a biological filter adds the method for ultrafiltration technology with the municipal effluent recharge groundwater; Comprise following process: the secondary treated wastewater with the municipal sewage plant is a raw material; Through behind denitrification bio-filter, ultra-filtration equipment and the ozone reaction; Permeate the ground with the surface flooding irrigation form, get into water table aquifer through the soil aeration zone.
2. the method for municipal effluent recharge groundwater as claimed in claim 1 is characterized in that: secondary treated wastewater is the bottom entering from denitrification bio-filter, and the C/N ratio is 4～6 in this denitrification bio-filter, and the pH value is 6.5～8.5.
3. the method for municipal effluent recharge groundwater as claimed in claim 1 is characterized in that: the ultra-filtration membrane material is molecular weight cut-off 100000～150000 daltonian tubular fibres in the said ultra-filtration equipment.
4. the method for municipal effluent recharge groundwater as claimed in claim 3 is characterized in that: the pressure reduction of said tubular fibre is that 0.04～0.1MPa, temperature are 13.1～25.4 ℃.
5. the method for municipal effluent recharge groundwater as claimed in claim 1 is characterized in that: the ozone dosage is 2～10mg/L water, and water residence time in ozone reactor is 10～30min.
6. the method for municipal effluent recharge groundwater as claimed in claim 1 is characterized in that: said aeration zone thickness is 3m at least.
7. the method for municipal effluent recharge groundwater as claimed in claim 1 is characterized in that: the hydropexis of said water table aquifer is 3～December.
8. a biological filter adds the device of ultrafiltration technology with the municipal effluent recharge groundwater, it is characterized in that: comprise denitrification bio-filter, ultra-filtration equipment, the ozone reactor of pipe connection successively and recharge the pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110223188A CN102311208A (en) | 2011-08-05 | 2011-08-05 | Method and device for supplying underground water with municipal sewage through biofilter and ultrafiltration technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110223188A CN102311208A (en) | 2011-08-05 | 2011-08-05 | Method and device for supplying underground water with municipal sewage through biofilter and ultrafiltration technology |
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| CN102311208A true CN102311208A (en) | 2012-01-11 |
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| CN201110223188A Pending CN102311208A (en) | 2011-08-05 | 2011-08-05 | Method and device for supplying underground water with municipal sewage through biofilter and ultrafiltration technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104944714A (en) * | 2015-07-20 | 2015-09-30 | 武汉水之蓝环保生物科技发展有限公司 | Sewage filter |
| CN105683447A (en) * | 2013-08-30 | 2016-06-15 | 徐庸燮 | Filtering system for artificial recharge and cleaning method for filtering system for artificial recharge |
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| CN101602562A (en) * | 2008-06-12 | 2009-12-16 | 中国科学院生态环境研究中心 | A kind of high-safety regenerated water deep treatment system |
| CN101423316A (en) * | 2008-11-25 | 2009-05-06 | 西安科技大学 | Two stage effluent treatment reuse technology |
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| 朱书堂 等: "城市污水地下回注:水资源的再生与循环利用", 《科技导报》, no. 1, 31 December 2003 (2003-12-31) * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105683447A (en) * | 2013-08-30 | 2016-06-15 | 徐庸燮 | Filtering system for artificial recharge and cleaning method for filtering system for artificial recharge |
| CN104944714A (en) * | 2015-07-20 | 2015-09-30 | 武汉水之蓝环保生物科技发展有限公司 | Sewage filter |
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Application publication date: 20120111 |